Which of the following best describes an atom?
a. protons and electrons grouped together in a random pattern.
b. protons and electrons grouped together in an alternating pattern.
c. a core of protons and neutrons surrounded by electrons.
d. a core of electrons and neutrons surrounded by protons.

uranium-238 i believe is your answer

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?